Coal-mining machine.



L. W. VEITCH. GOAL MINING MACHINE. lAPPLIOA'TION FILED Nov. 1s, 19o?.

Patented Sept. 29, 1908.

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LESLIE VW. VEITCH, OF DES MOINES,'IOWA.

COAL-MINING MACHINE.

'Specification of Letters Patent.

Patented Sept. 29, 1908.

Y Application led November 18, 1907. Serial-N0. 403,060.

To all whomc't' may concern:

Be it known that l, LESLIE Vnrron, a

citizen of the United States of America, andv resident of Des Moines, Polk county, Iowa, have invented a new` and useful Coal-Mining Machine, of which the following isa specification. i

The object of this invention'is to improved means for mining coal.

A further object of this invention is to proprovide vide improved means for breaking portions of coal 0H of the face of a vein.

My invention consists in the construction,- arrangement and combinationof elements hereinafter set forth,A pointed out in my claims and illustrated by the accompanying drawing, in which Figure 1 is a side elevation of the complete tool. Fig. 2 is a longitudinal, sectional view of the tool.

In the construction of the toolA or machine as shown, the numeral 10 designates a feed bar formed with a head 11 on one end portion and provided with a lever handle 12 mounted loosely in and transversely of said head. The feed bar 10 is circular in cross- .section and one end portion lthereof is smooth, the central and opposite end portions being threaded except the opposite extremity. The extreme end portion of the feed bar opposite the head 11 is reduced in cross-section and formed with a smooth periphery to form a journal 13. i A sleeve 14, circular in cross-section, is mounted loosely on the feed bar 10. Ears 15, 16 are formed on and extend longitudinally from one end portion of the sleeve 14 on opposite sides of the feed bar 10. Y Arms 17, 18, Vare arranged on opposite sides of the feed bar 10 and are bifurcated at one end toembrace the'ears 15, 16. The bifurcated` end ortions of the arms 17, 18are pivoted on t e ears,15,-16 by means of bolts 19, 2.0 mounted through them and secured by nuts. The opposite end portions of the arms 17, 18 are formed as semiannular wedges 21 22 and the adjacent faces of said wedges are slightly inclined in opposite. directions. The'sha e of the wedges 21, 22 is such that semi-circu arcutting edges 23, 24 are formed on the outer surfaces thereof. A wedge 25 is provided andis formed with a central, longitudinal, threaded bore. The wedge 25 is circular in cross-section at one end and the faces of said wedge converge toward the wedges 21, 22 while the sides there-` of are parallel and are curved transversely on on the feed'bar 10 and normally is arranged with its point between the wedges 21 22. A step block 26`is mounted loosely on the journal 13 and is of cylindrical form and of approximately the same diameter Vas the wedge 25 and sleeve 14. A box is provided and formed of two members 27, 28, permanently hinged together on one side by a hinge 29. A

hinge 30 is ymounted on the opposite side of the members 27,28, and the parts of said hinge are detachably connected by a pin 31 adapted to be manually seated and unseated relative thereto. The box is adapted to be mounted on and embrace the feed bar between the sleeve 14 and the head 11.

In practical use the parts are adjusted as shown in the drawing and the tool is inserted, step block first, into a drilled hole inthe face of a vein of coal. The feed bar 10 is rotated to the right by manual force applied to the lever handle 1'2. During the rotation of the feed bar 10 to the right, the sleeve 14 is held against rotation and holds the arms 17, 18. Since the wedge 25 is threaded to the feed bar, the rotation of said feed bar to the right causes said wedge to move outwardly between and separate the wedges 21, 22 laterally in opposite directions. The longitudinal, outward movement of the wedge 25 gradually increases the separation of the arms 17 18 and the wedges 21 22 and forces the cutting edges 23, 24 into the coal laterally of the drill hole, outward movement of the sleeve 14 being revented by the interposition of the box etween said sleeve and the head 1 1. When the wedges 21, 22 have been separated, the desired distance or as far as they will go, the box is removed from the feed bar by manual Withdrawal of the pin 31 and the separation of the members of the box away from the bar. Thereafter, the feed bar is further rotated to theright and the step block engages the bottom of the drill hole and resists the thrust of the feed bar. Then the thrust of the feed bar reacts on the wedges 21, 22 and causes said wedges to split ofic portions from the face of the vein of coal.`

The portions of coal split off from the vein and this tool again be employed-,to split off portions from the vein, or the tool may be removed to another drill hole and the operation thereof be repeated.

Iclaim as my invention n 1. A coal-mining machine, comprising a arcs. The wedge 25 is adapted to be screwed Y may be removed, the drill hole made deeper feed bar, a sleeve mounted loosely thereon,

Varms pivoted to said sleeve, lateral wedges K to enter between the lateral wedges.

2. A coal-mining machine, comprising a feed bar, means for rotating said feed bar, a sleeve loosely mounted on said feed bar, arms pivoted on said sleeve, lateral wedges on said arms, a wedge threaded to said feed bar and adapted to enter between the lateral wedges, and a box removably mounted on the feed bar adjacent said sleeve.

3. A coal-mining machine, comprising a feed bar formed with a head on one end, means for rotating said feed bar, a box removably mounted on the feed bar adjacent to its head, a sleeve loosely mounted. on the feed bar adjacent the box, arms pivoted on said sleeve, lateral Wedges on said arms and a Wedge threaded to said feed bar and adapted to enter between the lateral wedges.

4. A coal-minime` machine, comprising a feed bar, a sleeve loosely mounted on said feed. bar, arms on said sleeve and adapted for lateral oscillation, lateral wedges on said arms, a wedge threaded to said feed bar and adapted to enter between the lateral wedges and a step block journaled on said feed bar adjacent the threaded wedge.

5. A coal-mining machine, comprising a feed bar formed with ahead on one end and a step bleek journaled on the other end, alever handle mounted in the head of the feedbar, i.

arms carried by said sleeve, laterally prejecting wedges on said arms, said wedges formed with cutting edges outside the surface of said arms, and a wedge threaded en the feed bar and adapted to enter lwtween said arms.

Signed by. me at Des Moines, Iowa, this fifteenth day of November, 1906.

' LESLIE VEl'lUll'. litnesses S. C. SWEET, Ameno ANnnRsoN. 

